raid 5 on hp-ux 11.11

[andysys]

Hi

We have a HP 9000 server with HP-UX 11.11.
HP Surestore SC10 array is connected to it with 36gb*4 hdd.
RAID 5 is configured on it. Total disksize of RAID is
104gb.Recently we have added one more 36gb hdd in RAID5
[online addition] using irm utility.Reconstruction of
RAId 5 completed successfully without disturbing the data.
In irm it shows total disk space of RAID5 as 138gb.
But if we do vgdisplay /dev/vg01 it shows the old size of
the RAID5.i.e. 104gb [vg01 is created on RAID5 drive.]
RAID5 disk is /dev/dsk/c3t0d0 on which vg01 is created.

What action we need to take to recognize the new size if
RAID5 by operating system ?

Any help will be greatly appreciated.

Thanks

Andy

 

[ram1711]

hi Andy,
did u run vgextend to include the new disk in vg01?

HTH!
ram

 

[andysys]

Hi

Thanks for the reply.

Actually the disk is already assigned to vg01.
RAID5 disk is /dev/dsk/c3t0d0 --
Device is same only size is changed.[104GB TO 138GB]
For vgextend it asks for free disk drive.


Andy

 

[andysys]

Hi

After rebooting the system it shows new size of RAID5 disk
as 138gb in irdisplay.Before rebooting it was showing
104gb only.

RAID Device Files: /dev/[r]dsk/c6t0d0
RAID Device State: CLAIMED
RAID Level: RAID5
Size: 142258176 Kbytes

But still it is not working the new size 142gb ib vg03
configuration.

Can anyone help me on the same?

Thanks

Andy

 

[andysys]

hI
We rebooted the server.After rebooting the system it is
showing new size of RAID5 in output of irdisplay.

RAID Device State: CLAIMED
RAID Level: RAID5
Size: 142258176 Kbytes

Before booting it was showing 104gb.
Can I do it using vgexport & vgimport so that it will show
the new size of RAID5 device.

Thanks

Andy

 

[andysys]

I tried vgscan & vgchange.But didn't work.

Andy

 

[andysys]

Removed & recreated vg01.restored data from backup.
Problem resolved.

Andy

 

[Chacalinc]

Andy, despite a RAID (via hardware, i.e. HP SureStore, CLARiiON, EVA, etc) can increase the LUN size on-line, unfortunately O.S. can not support that. I think that the only one who can support that is veritas volume manager (but I'm not sure).

In order to increase the size of the filesystem, VG or LVOL (whitout including a new disk drive) the only way is destroy the VG and then recreating it with the new size.

Hope this help,
Regards.